| dc.contributor.advisor | SOSIATI, HARINI | |
| dc.contributor.advisor | SUDARISMAN, SUDARISMAN | |
| dc.contributor.author | ROSYID, FARIZ ABDUL | |
| dc.date.accessioned | 2020-02-24T06:56:10Z | |
| dc.date.available | 2020-02-24T06:56:10Z | |
| dc.date.issued | 2019-06-16 | |
| dc.identifier.uri | http://repository.umy.ac.id/handle/123456789/31990 | |
| dc.description | Serat alam sebagai bahan penguat komposit telah menarik minat para peneliti di
seluruh dunia karena sifat-sifatnya yang unggul seperti kekuatan spesifik tinggi, bobot
ringan, biaya murah, sifat mekanik yang relatif baik, non-abrasif dan biodegradable.
Komposit telah banyak digunakan untuk berbagai aplikasi dalam kehidupan manusia, tak
terkecuali untuk aplikasi perangkat biomedis. Namun komposit serat alam memiliki
kekuatan mekanis yang lebih rendah dibandingkan dengan komposit serat sintetis. Tujuan
dari penelitian ini yaitu membuat komposit hibrida high density polyethylene (HDPE)
berpenguat serat sisal, serat abaka dan serat karbon sebagai bahan perangkat biomedis, serta
mengetahui karakteristik sifat mekanis bending dan sifat fisis water absorption material
komposit hibrida dengan variasi fraksi volume serat hibrida.
Komposit hibrida difabrikasi dengan metode hand lay-up dalam mesin hot press pada
temperatur 140˚C dan 1,4498 MPa selama 60 menit dengan komposisi matriks/filler yaitu
80/20 %berat. Serat sisal dan abaka dialkalisasi dengan cara merendam masing-masing
serat dalam 6% NaOH selama 36 jam, sedangkan serat karbon diperlakukan dengan
nitrogen cair selama 10 menit. Variasi dilakukan pada perbandingan fraksi volume serat
hibrida abaka/sisal/karbon yaitu (3 : 0 : 1), (3 : 3 : 2), dan (0 : 3 : 1). Pengujian bending
berdasarkan ASTM D790 dan pengujian daya serap air berdasarkan ASTM D570
dilakukan pada semua spesimen komposit hibrida. Karakterisasi struktur retak uji bending
dilakukan dari sisi penampang melintang dengan mikroskop optik.
Hasil penelitian menunjukkan bahwa kekuatan tertinggi (45,93 MPa) dan modulus
elastisitas (3,024 GPa) komposit abaka/sisal/karbon/HDPE dicapai oleh variasi komposit
hibrida sisal/karbon (3:1) serta presentase penyerapan air dan pertambahan ketebalan yaitu
9,28% dan 3,91%. Hasil tersebut terkait dengan distribusi serat alam dan sintetis yang lebih
merata. | en_US |
| dc.description.abstract | Natural fibers as composite reinforcing materials have attracted the interest of
researchers around the world because of its superior properties such as specific strength,
light weight, low prices, good mechanical properties, non-abrasive and biodegradable.
Composites have been widely used for various applications in human life, including the
application of biomedical devices. However, natural fiber composites have lower
mechanical strength compared to synthetic fiber composites. The purpose of this study is
to make high density polyethylene (HDPE) hybrid composites reinforced sisal fiber, abaca
fiber and carbon fiber as biomedical device materials, and to know the mechanical
properties of bending and physical properties of water absorption hybrid composites with
variations in the volume fraction of hybrid fibers.
Hybrid composites were fabricated using the hand lay-up method in a hot press
machine at 140˚C and 1.4498 MPa for 60 minutes with a matrix/filler composition of
80/20% by weight. Sisal and abaca fibers are alkalized by soaking each fiber in 6% NaOH
for 36 hours, while carbon fiber is treated with liquid nitrogen for 10 minutes. Variations
were made on the ratio of volume fraction of abaca/sisal/carbon hybrid fibers, that is (3: 0:
1), (3: 3: 2), and (0: 3: 1). Bending tests with ASTM D790 and water absorption tests with
ASTM D570 were carried out on all hybrid composite specimens. The characterization of
the bending test crack structure is carried out from the side of the cross section using an
optical microscope.
The results showed that the highest strength (45.93 MPa) and elastic modulus
(3.024 GPa) of abaca/sisal/carbon/HDPE composites were achieved by variations in
sisal/carbon hybrid composites (3:1) and the percentage of water absorption and thickness
increase is 9.28% and 3.91%. These results are related to the more even distribution of
natural and synthetic fibers. | en_US |
| dc.publisher | FAKULTAS TEKNIK UNIVERSITAS MUHAMMADIYAH YOGYAKARTA | en_US |
| dc.subject | HDPE, sisal fiber, abaca fiber, carbon fiber, hybrid composite, flexural strength, water absorption | en_US |
| dc.title | PENGARUH JENIS SERAT TERHADAP SIFAT BENDING DAN WATER ABSORPTION KOMPOSIT HIBRIDA BERMATRIKS HIGH DENSITY POLYETHYLENE (HDPE) | en_US |
| dc.type | Thesis | en_US |
